Mathematics Exam Past Questions and Answers | JAMB, WAEC and NECO

Mathematics looks at measurement, relationships, and properties of numbers and groups using numbers and symbols. Important topics in math include arithmetic, algebra, geometry, and calculus.

• Question 821: If $\sqrt{3^x}$ = $\sqrt{9}$ then the value of x is: Options:
  A) $\frac{3}{4}$
  B) $\frac{4}{3}$
  C) $\frac{1}{3}$
  D) $\frac{2}{3}$
  E) $\frac{1}{2}$
  Show Answer
  The correct answer is E .
• Question 822: If e^x = 1 + $\frac{x}{2}$ + $\frac{x^2}{1.2}$ + $\frac{x^3}{1.2.3}$ + .....Find $\frac{1}{e^x}$ Options:
  A) 1 - $\frac{x}{2}$ + $\frac{x^2}{{1.2}^3}$ + $\frac{x^3}{2^4.3}$ + .........
  B) 1 - $\frac{x}{2}$ + $\frac{x^2}{{1.2}^3}$ + $\frac{x^4}{2.4.3}$ + ..
  C) 1 + $\frac{x}{2}$ + $\frac{x^2}{1.2}$ + $\frac{x^3}{1.2.3}$ + $\frac{x^4}{1.23.4}$ + .........
  D) 1 - x + $\frac{x^2}{{1.2}^3}$ + $\frac{x^3}{2^4.3}$ + .........
  E) 1 + $\frac{x}{2}$ + $\frac{x^2}{{1.2}^3}$ + $\frac{x^4}{1.2.6}$ + .........
  Show Answer
  The correct answer is C .
• Question 823:
  

  Calculate, correct to three significant figures, the length AB in the diagram above.

  Options:
  A) 36.4 cm
  B) 36.1 cm
  C) 36.2 cm
  D) 36.3 cm
  Show Answer
  The correct answer is C .
• Question 824: In a recent zonal championship games involving 10 teams, teams X and Y were given probabilities $\frac{2}{5}$ and $\frac{1}{3}$ respectively of winning the gold in the football event. What is the probability that either team will win the gold? Options:
  A) $\frac{2}{15}$
  B) $\frac{7}{15}$
  C) $\frac{11}{15}$
  D) $\frac{13}{15}$
  Show Answer
  The correct answer is C .
• Question 825: Evaluate $\frac{81.81+99.44}{20.09+36.16}$ correct to 3 significant figures. Options:
  A) 6.24
  B) 3.22
  C) 2.78
  D) 2.13
  Show Answer
  The correct answer is B .
• Question 826: In a restaurant, the cost of providing a particular type of food is partly constant and partially inversely proportional to the number of people. If cost per head for 100 people is 30k and the cost for 40 people is 60k, Find the cost for 50 people? Options:
  A) 15k
  B) 20k
  C) 50k
  D) 40k
  E) 45k
  Show Answer
  The correct answer is C .
• Question 827: Simplify 10² + log₁₀5 Options:
  A) 500
  B) 2 log₁₀ 5
  C) 10
  D) 25
  E) log₁₀5 x 10¹⁰⁰
  Show Answer
  The correct answer is E .
• Question 828: A basket contains 9 apples, 8 bananas and 7 oranges. A fruit is picked from the basket, find the probability that it is neither an apple nor an orange. Options:
  A) $\frac{3}{8}$
  B) $\frac{1}{3}$
  C) $\frac{7}{24}$
  D) $\frac{2}{3}$
  Show Answer
  The correct answer is B .
• Question 829: Find the number of ways of selecting 8 subjects from 12 subjects for an examination Options:
  A) 490
  B) 495
  C) 496
  D) 498
  Show Answer
  The correct answer is B .
• Question 830: Rationalize $\frac{2-\sqrt{5}}{3-\sqrt{5}}$ Options:
  A) $\frac{1-\sqrt{5}}{2}$
  B) $\frac{1-\sqrt{5}}{4}$
  C) $\frac{\sqrt{5}-1}{2}$
  D) $\frac{1+\sqrt{5}}{4}$
  Show Answer
  The correct answer is B .